Php/docs/imagick.filter
Imagick::filter
(PECL imagick 3 >= 3.3.0)
Imagick::filter — Description
Warning This function has been DEPRECATED as of Imagick 3.4.4. Relying on this function is highly discouraged.
Description
public Imagick::filter
( ImagickKernel $ImagickKernel
[, int $channel = Imagick::CHANNEL_UNDEFINED
] ) : bool
Applies a custom convolution kernel to the image.
Parameters
ImagickKernel- An instance of ImagickKernel that represents either a single kernel or a linked series of kernels.
channel- Provide any channel constant that is valid for your channel mode. To apply to more than one channel, combine channel constants using bitwise operators. Defaults to
Imagick::CHANNEL_DEFAULT. Refer to this list of channel constants
Return Values
Returns TRUE on success.
Examples
Example #1 Imagick::filter()
<?phpfunction filter($imagePath) { $imagick = new \Imagick(realpath($imagePath)); $matrix = [ [-1, 0, -1], [0, 5, 0], [-1, 0, -1], ]; $kernel = \ImagickKernel::fromMatrix($matrix); $strength = 0.5; $kernel->scale($strength, \Imagick::NORMALIZE_KERNEL_VALUE); $kernel->addUnityKernel(1 - $strength); $imagick->filter($kernel); header("Content-Type: image/jpg"); echo $imagick->getImageBlob();}?>
